simplefog.nvp

游戏编程精华02－含有几十个游戏编程例子

;
; Pixel shader 



#include "SimpleFog.h"

; Declare pixel shader version 1.0
ps.1.0


tex t0              ; decal texture



mul r0, t0, v0        ; v0 = ambient + diffuse for front facing illumination

; add height-based fog (oD1 == v1 in the pixel shader) 
; mult fog color by fog fac and add it in

mad r0, v1, c[CP_HEIGHT_FOG_COLOR], r0